Visual FoxPro

Creating an application/json HTTP POST Request

See more HTTP Examples

Demonstrates how to create an HTTP POST request having the Content-Type application/json, where the body of the HTTP request is the following JSON:

{
   "username" : "my_username",
   "password" : "my_password",
   "validation-factors" : {
      "validationFactors" : [
         {
            "name" : "remote_address",
            "value" : "127.0.0.1"
         }
      ]
   }
}

The generated HTTP request looks like this:

POST /something HTTP/1.1
Content-Type: application/json
Accept: application/json
Host: domain
Content-Length: 216

{
  "username": "my_username",
  "password": "my_password",
  "validation-factors": {
    "validationFactors": [
      {
        "name": "remote_address",
        "value": "127.0.0.1"
      }
    ]
  }
}

Visual FoxPro

LOCAL loReq
LOCAL loJson
LOCAL loVFactors
LOCAL loVArray
LOCAL loFactorObj
LOCAL lcRequestMime

* This example demonstrates building an application/json request.

loReq = CreateObject('Chilkat.HttpRequest')

* The ContentType, HttpVerb, and Path properties should
* always be explicitly set.
loReq.HttpVerb = "POST"
loReq.Path = "/something"
loReq.ContentType = "application/json"

* We may wish to add an "Accept" header to the request.
* This tells the server we'll accept an application/json response.
loReq.AddHeader("Accept","application/json")

* We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
loJson = CreateObject('Chilkat.JsonObject')
loJson.AppendString("username","my_username")
loJson.AppendString("password","my_password")

loVFactors = CreateObject('Chilkat.JsonObject')
loJson.AppendObject2("validation-factors",loVFactors)

loVArray = CreateObject('Chilkat.JsonArray')
loVFactors.AppendArray2("validationFactors",loVArray)

loFactorObj = CreateObject('Chilkat.JsonObject')
loVArray.AddObjectAt2(0,loFactorObj)
loFactorObj.AppendString("name","remote_address")
loFactorObj.AppendString("value","127.0.0.1")

* Use the JSON for the HTTP request body
* By default, the Emit method will output compact JSON.
* This is best for generating the smallest size request.
* To generate a more human-readable (pretty-printed) JSON request body,
* set the EmitCompact property to FALSE
loJson.EmitCompact = 0
loReq.LoadBodyFromString(loJson.Emit(),"utf-8")

* View the request that would be sent if HttpSReq was called:
lcRequestMime = loReq.GenerateRequestText()
? lcRequestMime

* A few important comments about the HTTP request that is generated:
* 
* 1) The Content-Length header is automatically generated based on the actual length of the MIME message
*    that follows the intial (topmost) MIME header.
* 2) The HOST header will automatically get filled in with the actual domain when HttpSReq
*    is called

RELEASE loReq
RELEASE loJson
RELEASE loVFactors
RELEASE loVArray
RELEASE loFactorObj